<!DOCTYPE html>
<html>
	<head>

		<meta charset="utf-8">
		<title></title>
		
		<script type="text/javascript" src="js/jquery.js"></script>
		<script type="text/javascript">
			$(function(){
				$("button").on("click",function(){
					$("p").slideToggle();
				});
			});
		</script>
	</head>
	<body>
		<p>This is a paragraph.</p>
		<button>请点击这里</button>
	</body>
</html>
